CVE-2026-73395
Received Received - Intake

Unauthenticated IDOR in Booking Calendar <= 3.2.36

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Patchstack

Description
Unauthenticated Insecure Direct Object References (IDOR) in Booking calendar, Appointment Booking System <= 3.2.36 versions.

CVSS Scores

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
CVE-2026-73395
EUVD
EUVD-2026-60801

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
booking_calendar appointment_booking_system to 3.2.36 (inc)
booking_calendar booking_calendar to 3.2.36 (inc)
appointment_booking_system appointment_booking_system to 3.2.36 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

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Executive Summary

This is an Insecure Direct Object References (IDOR) vulnerability in the WordPress Booking calendar, Appointment Booking System Plugin versions 3.2.36 and below. It allows unauthenticated attackers to bypass authorization and access sensitive files, folders, or database interactions due to broken access control.

Impact Analysis

The vulnerability poses a risk of unauthorized access to sensitive data or system functions. Attackers could exploit it to view, modify, or delete restricted information without authentication. With a CVSS score of 6.5, it is considered moderately dangerous and could be targeted in mass exploitation campaigns.

Mitigation Strategies

Immediately update the Booking calendar, Appointment Booking System Plugin to the latest version if available. If no patch exists, contact your hosting provider or developer for assistance. Disable the plugin temporarily if updates are not possible.

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